The outer grey circle is the Earth's penumbra, and the inner black circle is the umbra. Any part of the Moon which
passes within the black circle will be unilluminated, while any part within the grey circle will appear less bright
than usual.

Animated simulation Still image of key moments Diagram of Moon's path

Zenith up North up

There will be a partial eclipse of the Moon, though it will not be visible from Ashburn since the Moon will be beneath the horizon at the time.

The eclipse will last from 13:23 until 15:18, and maximum eclipse will occur at 14:21, when 25% of the Moon's disk will lie in shadow (all times given in Ashburn time).

Eclipses of the Moon are easy to watch with the unaided eye. A modest pair of
binoculars will give a superb view of the Moon's surface, but are not required.
Unlike solar eclipses, lunar eclipses are entirely safe to look at without the
need to look through any kind of filter.

They occur whenever the Earth passes between the Moon and Sun, such that it
obscures the Sun's light and casts a shadow onto the Moon's surface. The
circular shadow cast by the Earth appears as a bite taken out of the Moon
during its partial phases.

Sequence of events

The eclipse will begin at
11:51,
when the Moon first enters a region of the Earth's shadow called the penumbra.
In this outer part of the Earth's shadow, an observer on the Moon would see the
Sun partially obscuring the Sun's disk, but not completely covering it. As a
result the Moon's brightness will begin to dim, as it is less strongly
illuminated by the Sun, but it remains illuminated.

At
13:23,
the edge of the Moon's disk will enter the Earth's umbra. This is the region of
space in which an observer on the Moon's surface would see the Earth completely
obscuring the whole of the Sun's disk, and would find themselves suddenly
thrust into darkness.

As an increasing fraction of the Moon's face creeps into the Earth's umbra, it
will appear to have a growing bite taken out of it. We will see our planet's
circular shadow sweep across the face of the Moon.

The table below lists the times when each part of the eclipse will begin and
end.

Localtime

UTC

11:51

15:51

Moon begins to enter the Earth's penumbra

13:23

17:23

Moon begins to enters the Earth's umbra. Partial eclipse begins.

14:21

18:21

Greatest eclipse

15:18

19:18

Moon fully outside the Earth's umbra. Partial eclipse ends.

16:51

20:51

Moon leaves the Earth's penumbra

The geometry of a lunar eclipse. Within the penumbra, the Earth covers some fraction of the Sun's disk, but not all of
it. In the umbra, the Earth covers the entirity of the Sun's disk. Any parts of the Moon's surface that lie within
the Earth's umbra will appear unilluminated.
Image courtesy of F. Sogumo.

Visibility of the eclipse

Eclipses of the Moon are visible anywhere where the Moon is above the horizon
at the time. Since the geometry of lunar eclipses requires that the Moon is
directly opposite the Sun in the sky, the Moon can be seen above the horizon
anywhere where the Sun is beneath the horizon. The map below shows where the
eclipse of August 7 will be visible.

Source

You may embed the map above in your own website. It is licensed under the Creative Commons Attribution 3.0 Unported license, which allows you to copy and/or modify it, so long as you credit In-The-Sky.org.